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Sign sensitive aperture correction system and method

  • US 7,012,719 B1
  • Filed: 06/23/1999
  • Issued: 03/14/2006
  • Est. Priority Date: 06/25/1998
  • Status: Expired due to Fees
First Claim
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1. A method of edge enhancement, comprising the acts of:

  • extracting a first high frequency portion in a first direction of data representative of relative light intensity of a reference pixel;

    extracting a second high frequency portion in a second direction of data representative of relative light intensity of the reference pixel, the first direction being perpendicular to the second direction;

    outputting selected data from the first high frequency portion and the second high frequency portion;

    determining a correction coefficient based upon a sign and a value of the extracted high reference pixel in the data, the sign being indicative of a relation between the relative light intensity of the reference pixel and that of pixels surrounding the reference pixel; and

    correcting the selected data based upon the correction coefficient.

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